New member, soon to be first time diesel owner

Fergal

New member
Joined
Jan 17, 2026
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3
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2
Location
CT
I just found this site and have already found some helpful info. I just recently ordered a 2026 GMC AT4X-AEV with the diesel. This will be my first diesel engine, second HD type truck (the first was a while ago). I've owned two Dodge's, a 1500 first, then a 2500 in the 90s and early 00s. I liked those trucks. Due to some life changes I down sized to a Tacoma from ~06 - 18 (two, one used, one new, both were great, both got full frame replacements tho). In 2018 I got a Tundra (my current truck). It's time for a new truck and due to Toyota's poor decision to make the the new Tundra with a turbo 6, that's not an option. It's a good truck that's treated me well, no issues with it.

I didn't due a lot of looking/research for a new truck and decided on the GMC pretty quickly. I did take some time going thru various builds, options, etc. and finally said screw it and decided on the diesel AEV. To be honest, I currently have no real need for this truck but I wanted it. I don't have anything to tow but that will likely change soon with a small boat. I do 'need' a 4wd for fishing and some some light off road use. I live in CT but travel to NC and will likely retire there and maybe a small place on the gulf in a few years. So, to some extent, I'll grow into the truck but again, it's more truck than I need - but I wanted it. I've always settled a little with past trucks, not this time.

I'm just stating to go down the diesel rabbit hole and Im realizing I have a good bit to learn but I have some time, 3-5 months for the truck to arrive. I'm sure this site will be helpful. Right now I'm looking into general maintenance (probably finding a shop vs the stealership), cold weather use, fuel additives, etc.
 

The search function will be helpful for you when you're snowed in..

To start you off...

Thread 'Marvel Mystery oil??? to use or not to use in brand new diesel??' https://www.at4forum.com/threads/marvel-mystery-oil-to-use-or-not-to-use-in-brand-new-diesel.2096/

Thread 'Cold weather prep?' https://www.at4forum.com/threads/cold-weather-prep.2023/

Thread 'High Idle' https://www.at4forum.com/threads/high-idle.1677/

Thread 'BioDiesel? Renewable Diesel' https://www.at4forum.com/threads/biodiesel-renewable-diesel.1715/
 

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